A tetrazolinone compound represented by formula (1): wherein Q represents a divalent 5-membred aromatic heterocyclic group optionally having one or more atoms or groups selected from Group P 2 ； A represents a 5- to 10-membered monocyclic or fused ring heterocyclic group optionally having one or more atoms or groups selected from Group P 1 ； R 1 and R 2 each represents a hydrogen atom, etc.； R 3 represents a C1-C6 alkyl group optionally having one or more halogen atoms, etc.； R 4 , R 5 , and R 6 each represents a hydrogen atom, etc.； and X represents an oxygen atom or a sulfur atom, has excellent control activity against pests.
